Light-intensity data-logger LI19

USBwith PC interfacewith screen

LI19 is a high-accuracy handheld read-out unit and data logger for mobile and short-term field measurements. It is typically used with heat flux and solar radiation sensors and can act as an accurate millivolt amplifier when connected to a PC.


Main uses and capabilities

• Mobile measurements and short-term data logging
• Acts as a millivolt amplifier directly connected to a PC via USB
• Compatible with a variety of sensors (commonly heat flux and solar radiation sensors)
• Displays measured values in engineering units after programming sensor sensitivity

Features / technical specifications

• Output on display: heat flux, solar radiation
• Input: analog voltage
• Conversion: division by the sensor sensitivity
• Display definition: 4 digits with sign
• Display refresh rate: 1 s⁻¹
• Sample rate: 2 s⁻¹
• Calibration uncertainty: 0.1 %
• Temperature dependence: < 0.5 % 3 x 10⁻⁶ V over rated range
• Rated input range: 6.25 to 200 x 10⁻³ V (selectable)
• A/D conversion: 16 bits
• Stored measurement definition: minimum, maximum and average over storage interval with conversion to W/m²
• Storage capacity: 3518 measurements
• Storage interval range: 2 to 65535 s (selectable)
• Compatibility with Hukx sensor models: SR05-A1, HFP01, SBG01, HF03
• Battery type: 2 x AA
• Internal power supply voltage: 3 VDC
• Battery life: > 50 days (on fresh batteries)
• Rated operating temperature range: -10 to 40 C
• System requirements for use with PC: Windows XP and higher
• Connection to PC: USB 1.1 / 2.0 low speed
• User interface on PC: LI19 software
• IP protection class: IP40
• Connection to sensor: 2 x female chassis plug for 4 mm banana with screwed signal wire clamp
• Weight: 0.175 kg (net), 1.3 kg with carrying case
• Dimensions (LI19): 70 x 146 x 25 mm
• Dimensions transport case: 400 x 300 x 120 mm

*Additional products, as seen in the images on this page, are sold separately.